Table 2.
Participant characteristics, proportions of missing data, and sample sizes by study
| Study | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
2 (n = 144) |
8a (n = 827) |
8b (n = 1129) |
8c (n = 244) |
9 (n = 314) |
12 (n = 157) |
16 (n = 183) |
18 (n = 140) |
21 (n = 193) |
22 (n = 360) |
All studies (N = 3691) |
|
| Sex | |||||||||||
| - Female | 44 (30.6%) | 576 (69.6%) | 688 (60.9%) | 147 (60.2%) | 200 (63.7%) | 83 (52.9%) | 183 (100%) | 101 (72.1%) | 125 (64.8%) | 207 (57.5%) | 2354 (63.8%) |
| - Male | 100 (69.4%) | 251 (30.4%) | 441 (39.1%) | 97 (39.8%) | 114 (36.3%) | 74 (47.1%) | - | 38 (27.1%) | 68 (35.2%) | 153 (42.5%) | 1336 (36.2%) |
| - Missing | - | - | - | - | - | - | - | 1 (0.7%) | - | - | 1 (0.03%) |
| Race | |||||||||||
| - White | 101 (70.1%) | 713 (86.2%) | 752 (66.6%) | 210 (86.1%) | 230 (73.2%) | 143 (91.1%) | 118 (64.5%) | 127 (90.7%) | 166 (86.0%) | 330 (91.7%) | 2890 (78.3%) |
| - Non-White | 40 (27.8%) | 103 (12.5%) | 369 (32.7%) | 31 (12.7%) | 84 (26.8%) | 11 (7.0%) | 63 (34.4%) | 13 (9.3%) | 27 (14.0%) | 30 (8.3%) | 771 (20.9%) |
| - Missing | 3 (2.1%) | 11 (1.3%) | 8 (0.7%) | 8 (1.2%) | - | 3 (1.9%) | 2 (1.1%) | - | - | - | 30 (0.8%) |
| First-year student | |||||||||||
| - No | 59 (41.0%) | 435 (52.6%) | 592 (52.4%) | 152 (62.3%) | - | 152 (96.8%) | - | 98 (70.0%) | 115 (59.6%) | - | 1603 (43.4%) |
| - Yes | 85 (59.0%) | 386 (46.7%) | 532 (47.1%) | 91 (37.3%) | 314 (100%) | 5 (3.2%) | 183 (100%) | 41 (29.3%) | 78 (40.4%) | 360 (100%) | 2075 (56.2%) |
| - Missing | - | 6 (0.7%) | 5 (0.4%) | 1 (0.4%) | - | - | - | 1 (0.7%) | - | - | 13 (0.4%) |
| Alcohol-related problems | |||||||||||
| - Baseline | |||||||||||
| - Mean (SD) | −0.5 (0.7) | 0.1 (0.9) | 0.2 (1.0) | 0.1 (0.9) | 0.9 (0.7) | 0.4 (0.6) | −0.1 (0.9) | 0.1 (0.9) | 0.9 (0.8) | 0.0 (0.9) | 0.2 (0.9) |
| - Range | [−1.7, 1.2] | [−1.5, 3.5] | [−1.7, 3.5] | [−1.5, 2.6] | [−1.2, 2.9] | [−1.2, 1.8] | [−1.7, 1.9] | [−1.6, 2.1] | [−0.7, 2.9] | [−1.5, 2.0] | [−1.7, 3.5] |
| - Missing | - | 3 (0.4%) | 3 (0.3%) | - | - | - | - | - | - | - | 6 (0.2%) |
| - Post-baseline | |||||||||||
| - Mean (SD) | −0.7 (0.7) | 0.2 (0.8) | 0.3 (0.9) | 0.2 (0.9) | 0.8 (0.8) | 0.3 (0.6) | 0.1 (1.0) | 0.0 (1.0) | 0.6 (0.8) | 0.3 (0.9) | 0.3 (0.9) |
| - Range | [−1.7, 1.3] | [−1.4, 3.3] | [−1.7, 3.3] | [−1.5, 3.2] | [−1.3, 3.6] | [−1.2, 1.8] | [−1.7, 2.6] | [−1.6, 2.9] | [−0.9, 3.3] | [−1.5, 2.4] | [−1.7, 3.6] |
| - Missing | - | - | - | - | - | - | - | 2 (1.4%) | 2 (1.0%) | - | 4 (0.1%) |
| Protective behavioral strategies | |||||||||||
| - Baseline | |||||||||||
| - Mean (SD) | 0.9 (0.8) | 0.5 (0.8) | 0.5 (0.9) | 0.4 (0.9) | 0.4 (0.8) | −0.4 (0.9) | 0.8 (1.2) | 0.5 (0.8) | 0.3 (0.9) | 0.4 (0.8) | 0.5 (0.9) |
| - Range | [−1.0, 3.1] | [−2.3, 2.9] | [−2.2, 3.4] | [−2.4, 3.2] | [−1.6, 2.6] | [−2.3, 2.7] | [−2.8, 3.2] | [−2.0, 3.4] | [−2.2, 3.4] | [−2.4, 2.6] | [−2.8, 3.4] |
| - Missing | 18 (12.5%) | 206 (24.9%) | 258 (22.9%) | 40 (16.4%) | - | - | 66 (36.1%) | 9 (6.4%) | - | 72 (20.0%) | 669 (18.1%) |
| - Post-baseline | |||||||||||
| - Mean (SD) | 1.0 (0.9) | 0.6 (0.8) | 0.6 (0.9) | 0.6 (0.9) | 0.4 (0.8) | −0.3 (0.9) | 0.7 (1.1) | 0.6 (1.2) | 0.4 (0.9) | 0.3 (0.9) | 0.5 (0.9) |
| - Range | [−1.7, 3.4] | [−1.6, 3.2] | [−2.6, 3.5] | [−2.4, 2.6] | [−1.7, 2.9] | [−2.3, 1.6] | [−2.4, 2.8] | [−2.8, 3.4] | [−2.0, 3.4] | [−2.6, 2.6] | [−2.8, 3.5] |
| - Missing | 0 (0.0%) | 12 (1.5%) | 25 (2.2%) | 1 (0.4%) | 6 (1.9%) | - | 3 (1.6%) | 2 (1.4%) | 2 (1.0%) | - | 51 (1.4%) |